9th class Physics unit 8 MCQs
chapter 8 MCQs 9th Class Physics
Thermal Properties of Matter:
1. A large water reserviour keeps the temperature of nearby land moderate due to:
a. less absorption of heat
b. low temperature of water
c. large specific heat of water
d. low specific heat of water
2. In ……… state of matter, molecules do not leave their position.
a. Gas
b. Solid
c. Plasma
d. Liquid
3. Metals are good conductor of heat due to the:
a. Small size of their molecules
b. Free Electrons
c. Rapid vibration of their molecules.
d. Big size of their molecules
4. ……… of crocus is natural thermometer:
a. Stem
b. Flower
c. Root
d. Root
5. Water freezes at:
a. -2730k
b. 00F
c. 00k
d. 320F
6. Normal human body temperature is:
a. 370F
b. 150C
c. 98.60C
d. 370C
7. Mercury is used as thermometric material because it has:
a. Small heat capacity
b. Uniform thermal expansion
c. Low freezing point
d. All the above properties
8. The water converts into ice at a temperature:
a. -2730k
b. 0oF
c. 0oK
d. 32oF
9. Boiling point of water is:
a. 273o C
b. 0oC
c. 100 K
d. 100oC
10. Mercury freezes at:
a. -39° C
b. 0° C
c. -100° C
d. -357° C
11. Temperature of ice in freezer is:
a. -18° C
b. 0° C
c. -28° C
d. -8° C
12. Complete the equation: T( K) = ……:
a. 273 + F
b. 273 + C
c. 273 – F
d. 273 – C
13. Absolute zero is equal to:
a. 100° C
b. 0° C
c. -273° C
d. 100 K
14. On Celsius scale, 50° C is equal on Fahrenheit scale to:
a. 122° F
b. 100° F
c. 90° F
d. 102° F
15. Which of the following materials has large specific heat?
a. Water
b. Copper
c. Mercury
d. Ice
16. Unit of specific heat capacity in SI system is:
a. JkgK
b. Jkg-1 K-1
c. Jkg-2 K-2
d. J-1 kg-1 K-1
17. Specific heat of iron is:
a. 470.0 Jkg-1 K-1
b. 387.0 Jkg-1 K-1
c. 903.0 Jkg-1 K-1
d. 920.0 Jkg-1 K-1
18. The specific heat of water is:
a. 2500 Jkg-1 K-1
b. 800 Jkg-1 K-1
c. 1760 Jkg-1 K-1
d. 4200 Jkg-1 K-1
19. Latent heat of fusion of 1 kg of ice at 0° C is:
a. 3.36 x 103Jkg-1
b. 33.6 x 105 Jkg-1
c. 336 x 105 Jkg-1
d. 3.36 x 105 Jkg-1
20. Which of the following affects evaporation?Wind
a. Wind
b. Temperature
c. Surface area of the liquid
d. All of the above
21. Which of the following materials has large value of temperature coefficient of linear expansion?
a. Brass
b. Aluminum
c. Steel
d. Gold
22. What will be the value of β for a solid for which has a value of 2 x 10-5 K-1 ?
a. 8 x 10-15 K-1
b. 2 x 10-5 K-1
c. 8 x 10-5 K-1
d. 6 x 10-5 k-1
23. Which gas is used in spite of Freon gas in refrigerator?
a. NH3
b. CO2
c. N2
d. H2
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